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我是Nowfal,一位C#程序员。我是Node JS的新手。
当我创建一个函数并在setInterval内部给出一个错误时,
TypeError:无法读取未定义的属性“应用”
在包装器上[作为_onTimeout](timers.js:274:13)
在Timer.listOnTimeout(timers.js:119:15)
我的代码页如下
页面1(Server.js)
var db = require('./dbConnect.js');
var ins = require('./dbInsert.js');
var tagId = [];
var schoolInfoId = [];
var imeNo = [];
var totalRows = 0;
function ViewQuery() {
var mysql = db.mysql;
var connection = db.createMyConnection();
connection.connect();
var mycommand = "SELECT t.skha_tag_id_no,s.skha_school_info_id,a.skha_out_device_imeno" +
" FROM skha_tag t INNER JOIN skha_student_info s on skha_tag_id = skha_student_tag_id_no " +
" INNER JOIN skha_student_school_attendance a on a.skha_student_info_id = s.skha_student_info_id" +
" WHERE DATE(skha_student_in_time) = CURDATE() AND skha_student_out_time IS NULL and skha_out_status = 1 ";
connection.query(mycommand, function (err, rows) {
if (!err) {
var result;
for (i = 0; i < rows.length; i++) {
totalRows++;
result = rows[i];
tagId.push(result['skha_tag_id_no']);
schoolInfoId.push(result['skha_school_info_id']);
imeNo.push(result['skha_out_device_imeno']);
}
for (i = 0; i < totalRows; i++) {
ins.insertDB(tagId[i], schoolInfoId[i], imeNo[i]);
}
}
else
console.log('Error while performing Query.');
});
connection.end();
};
setInterval(ViewQuery(),30000); //Error Generating from here
var mysql = require('mysql');
exports.createMyConnection = function createMyConnection() {
var connection = mysql.createConnection( {
host : '192.168.0.175',
user : 'ss_user',
password : 'df33-ccff2188',
database : 'shkaliasdb',
multipleStatements: true
});
return connection;
}
exports.mysql = mysql;
var db = require('./dbConnect.js');
var logOutTimeInterval = 5;
exports.insertDB = function (RFID, schoolID, imei) {
var mysql = db.mysql;
var connection = db.createMyConnection();
connection.connect();
console.log('IMEI : ' + imei);
console.log(RFID);
str = "SET @OutStatus=0;SET @logOutTime=0;call out_mark_save_two_device('" + RFID + "'," + schoolID + "," + logOutTimeInterval + ",@OutStatus,@logOutTime," + imei + ")";
console.log(str);
connection.query(str, function (err, rows, fields) {//, fields
if (err)
console.log('Error while performing Query.' + err);
else {
console.log(rows[0]);
}
});
connection.end();
};
最佳答案
显示来自timers.js的代码。
您从 undefined object 调用“应用”方法。方法“应用”工作
关于.net - Node JS setInterval。 TypeError : Cannot read property 'apply' of undefined,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/31605654/
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